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D( x )
3*x^2+2*x-8 = 0
3*x^2+2*x-8 = 0
3*x^2+2*x-8 = 0
3*x^2+2*x-8 = 0
DELTA = 2^2-(-8*3*4)
DELTA = 100
DELTA > 0
x = (100^(1/2)-2)/(2*3) or x = (-100^(1/2)-2)/(2*3)
x = 4/3 or x = -2
x in (-oo:-2) U (-2:4/3) U (4/3:+oo)
(6*x-18)/(3*x^2+2*x-8) = 0
3*x^2+2*x-8 = 0
3*x^2+2*x-8 = 0
DELTA = 2^2-(-8*3*4)
DELTA = 100
DELTA > 0
x = (100^(1/2)-2)/(2*3) or x = (-100^(1/2)-2)/(2*3)
x = 4/3 or x = -2
(x+2)*(x-4/3) = 0
(6*x-18)/((x+2)*(x-4/3)) = 0
6*x-18 = 0 // + 18
6*x = 18 // : 6
x = 18/6
x = 3
x = 3
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